Here's some more esoterica. We needed a spring bed texture that shows water bubbling up through the sand. Fortunately, I was able to run a digital photo (I own all rights) of the Siegritzer spring bed through ImageSynth (TM) and get exactly what I wanted. Here it is, for anyone who can use it. The spring bed that was photographed is in the Northern Bavarian Franconian Switzerland Mountains. It produces a creek that once turned a pump waterwheel which in turn pumped water to a village atop the mountain. ImageSynth makes the fill pattern tile seamlessly.